A interesting side note: When I moved to NC from Indiana, we moved into a brand new house. I was in and out of the crawl space due to a variety of issues. For the last two years we lived there, I had unbearable hives. The doctors could not figure out what they were caused by. I moved back to Indiana and have not had a breakout of hives since. It was almost immediate. I really believe it was the chemicals in the house and crawl space that brought on the allergies.